(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

http://img16.imageshack.us/img16/6606/50381320.jpg [Broken]

2. Relevant equations

Please see above picture

3. The attempt at a solution

I believe for question a) I just need to add up all the matrices and then row reduce to RREF, which gives me:

[1,0,0]

[0,1,0]

or Do I row reduce each matrices?

I'm really not sure how to do b), any tips would be great!

Thanks

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# Set forms a basis, and span help

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